I have one that I use for travel with an S&S coupler equipped bike (you have to deflate the tires to get the wheels in the travel case) and it works ok for the limited use I need.

However, I find it awkward to use as the handle is cramped and I tend to hit my knuckles on most strokes. The gauge is better than nothing but very crude. I would not want to have to rely on it for routine use and I doubt it's durability in daily service.